I have just completed my PWM modulator using Steve's boards. Before applying HT I thought I would check whether all seemed OK with just the LT supplies. The PWM board is all fine, and the overload board does what it should in the initial set up condition. However, with the modulator on standby (with LT supplies to the two boards and to the output section on) I find that I get 16.8 V on the output from the PWM filter (with no load). Is this OK? I am a little nervous about applying the HT to the MOSFETS unless all is OK. Your advice would be welome.